In the January 2013 Direct, Nintendo said we can expect a new 3D Super Mario,, Mario Kart and Smash Bros titles to be revealed and made playable at E3 in June. As for Tropical Freeze, Nintendo did not mention it until it was announced and made playable at E3. Tropical Freeze was the only surprise game announcement Nintendo made at E3.
Yes, Nintendo also revealed most of its 3DS games for last year in January, February and April of 2013. The games were A Link Between Worlds, Yoshi's New Island, Mario Party, and Mario & Luigi: Dream Team. In addition, Nintendo confirmed localization for third party games like Shin Megami Tensei 4, Bravely Default, Guild 02, Professor Layton & Azran Legacies before E3.